Investigation on the performance of cationic starch and CMC addition on strength properties of fluting paper produced from OCC
2009
Jalali Torshizi, H., Ph.D Student in Wood and Paper Science and Technology Faculty of Natural Resources,University of Tehran | jahan- Latibari, A., Assist. Prof. Islamic Azad University | Mirshokraei, S.A., Profusor University of Payam Noor.Contral Organization | Faezipour, M.M.
Growing in production and consumption of various grades of papers, especially packaging grades has caused the paper industry to face limitation and shortage of raw material. Consequently this industry has searched different ways of fulfilling the raw material needs and among them, recycling of waste papers is promising. Even though paper recycling shows advantages and potentials, but also faces limitations of which deterioration of fiber quality is very important. In order to reduce the adverse affect of paper recycling on fiber and paper quality, addition of different dry-strength additives is unavoidable. This is the main objective of this investigation. In order to study the influence of the combination of dry strength additives on properties of fluting paper produced from 100% OCC, the addition of four levels of cationic starch (0, 1, 2, 3 % on BD basis) and four levels of CMC (0, 0.5, 1, 1.5 % on BD basis) is investigated. Hand sheets were produced at 120 g/m2 basis weight and strength properties of hand sheets were measured. The results revealed that the addition of 1.5 % CMC, not only reduced the strength properties of paper, but also adversely affected the performance of cationic starch. However, at all levels of CMC, increasing the consumption of cationic starch improved the strength properties significantly. The highest strength of fluting paper was reached at 1 % CMC and 3 % cationic starch. However, the highest folding strength was at 1.5 % CMC and 3 % cationic starch which is almost twice the value of control paper without dry-strength additives.
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